osfmk/vm/vm_user.c

1869 	vm_named_entry_t	parent_entry;
1924 		parent_entry = (vm_named_entry_t) parent_handle->ip_kobject;
1926 		parent_entry = NULL;
1929 	if (parent_entry && parent_entry->is_copy) {
1949 		if (use_data_addr || parent_entry == NULL) {
1953 		parent_is_object = !(parent_entry->is_sub_map ||
1954 				     parent_entry->is_pager);
1955 		object = parent_entry->backing.object;
1960 		if((access != GET_MAP_MEM(parent_entry->protection)) &&
1961 				!(parent_entry->protection & VM_PROT_WRITE)) {
1965 		   SET_MAP_MEM(access, parent_entry->protection);
1968 		   SET_MAP_MEM(access, parent_entry->protection);
1971 		   SET_MAP_MEM(access, parent_entry->protection);
1974 		   SET_MAP_MEM(access, parent_entry->protection);
1977 		   SET_MAP_MEM(access, parent_entry->protection);
2208 	if (parent_entry == NULL ||
2629 			 * Compare what we got with the "parent_entry".
2630 			 * If they match, re-use the "parent_entry" instead
2633 			if (parent_entry != NULL &&
2634 			    parent_entry->backing.object == object &&
2635 			    parent_entry->internal == object->internal &&
2636 			    parent_entry->is_sub_map == FALSE &&
2637 			    parent_entry->is_pager == FALSE &&
2638 			    parent_entry->offset == obj_off &&
2639 			    parent_entry->protection == protections &&
2640 			    parent_entry->size == map_size &&
2641 			    ((!use_data_addr && (parent_entry->data_offset == 0)) ||
2642 			     (use_data_addr && (parent_entry->data_offset == offset_in_page)))) {
2644 				 * We have a match: re-use "parent_entry".
2649 				/* parent_entry->ref_count++; XXX ? */
2691 		if (parent_entry == NULL) {
2701 			if (parent_entry->is_pager || parent_entry->is_sub_map) {
2708 			if((offset + *size + parent_entry->data_offset) > parent_entry->size) {
2713 			map_offset = vm_map_trunc_page(offset + parent_entry->data_offset, PAGE_MASK);
2714 			offset_in_page = (offset + parent_entry->data_offset) - map_offset;
2715 			map_size = vm_map_round_page(offset + parent_entry->data_offset + *size, PAGE_MASK) - map_offset;
2720 			if((offset + map_size) > parent_entry->size) {
2732 			protections &= parent_entry->protection;
2734 		if((protections & parent_entry->protection) != protections) {
2746 		user_entry->offset = parent_entry->offset + map_offset;
2748 		user_entry->is_sub_map = parent_entry->is_sub_map;
2749 		user_entry->is_pager = parent_entry->is_pager;
2750 		user_entry->is_copy = parent_entry->is_copy;
2751 		user_entry->internal = parent_entry->internal;
2758 		if(parent_entry->is_sub_map) {
2759 		   user_entry->backing.map = parent_entry->backing.map;
2764 		else if (parent_entry->is_pager) {
2765 		   user_entry->backing.pager = parent_entry->backing.pager;
2768 		   object = parent_entry->backing.object;
2819 	ipc_port_t		parent_entry)
2827 			parent_entry);
2839 	ipc_port_t		parent_entry)
2847 			parent_entry);